Version

4.1.6

Reproduction link

https://github.com/a1mersnow/repro-comment

Steps to reproduce

1. visit /b
2. click 'to A'

What is expected?

rendering A

What is actually happening?

rendering nothing

However, if you remove the comment '' in Component TheB, the issue gone.

I meet the issue accidentally, it's very hard to discover/debug. At lease, we should warn in console, so the developer know how to fix it.

this would rather be because of the transition than because of the router.

I'll move this issue to vue core.

Duplicate of https://github.com/vuejs/core/issues/4830